Lets say a text need to Shown as some part in bold some are in italic and in different Color.
You can aslo show a list.
Add a PlaceHolder where you want this kind of text in SSRS 2008 report.
Then go to place holder properties in the general section you will find Markup Type
By default it is None, change this to HTML
Then in the Value ,
Write the following exoression.
="<b>In Bold</b><i> i am in italic</i><font color='red'> What about red</font>"
*Please note only some basic or selected HTML tags will work